<![CDATA[This research aims to analyze the improvement of fine motor skills in students with intellectual disabilities through Lego play. The research method used is single subject research with an A-B design conducted over 10 meetings, consisting of 3 meetings of the baseline phase (A1) and 7 meetings of the intervention phase (B). The research subject is a student with intellectual disabilities at SLB Negeri 1 Kubung. The data obtained is analyzed descriptively quantitatively. The results showed that in the baseline phase (A1) the student's fine motor skills were stable at a mean level of 55% with a stability range of 8.25%, while in the intervention phase (B) there was a significant gradual increase with a mean level of 77.71% and a stability range of 12.6%. Data analysis showed a significant increase of 22.71% from the baseline phase to the intervention phase. The tendency of the data trace changed from flat in the baseline phase to increasing in the intervention phase. Overlap data of 0% indicates no overlap between the two phases, indicating a very strong intervention effectiveness with a stability percentage that remains at 85.7% which indicates a consistent and controlled ability improvement process]]>
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